class ProtobufAT36 < Formula
  desc "Protocol buffers (Google's data interchange format)"
  homepage "https://github.com/protocolbuffers/protobuf/"
  url "https://github.com/protocolbuffers/protobuf/archive/v3.6.1.3.tar.gz"
  sha256 "73fdad358857e120fd0fa19e071a96e15c0f23bb25f85d3f7009abfd4f264a2a"
  revision 1

  bottle do
    cellar :any
    sha256 "c63ef4229b268aa9e9ecfa914e9cc2322912d4074b45d4bf33b91b3023230304" => :mojave
    sha256 "80a661fc724ca34b8173ff314df14041b9a29f8e1cc952e8e3e614766b6607ae" => :high_sierra
    sha256 "7aa1810eb949a21849da05366acf57b7235565432d3259ee40a6920cfd4c7e13" => :sierra
  end

  keg_only :versioned_formula

  depends_on "autoconf" => :build
  depends_on "automake" => :build
  depends_on "cmake" => :build
  depends_on "libtool" => :build
  depends_on "python"

  resource "six" do
    url "https://files.pythonhosted.org/packages/dd/bf/4138e7bfb757de47d1f4b6994648ec67a51efe58fa907c1e11e350cddfca/six-1.12.0.tar.gz"
    sha256 "d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
  end

  resource "gtest" do
    url "https://github.com/google/googletest/archive/release-1.8.1.tar.gz"
    sha256 "9bf1fe5182a604b4135edc1a425ae356c9ad15e9b23f9f12a02e80184c3a249c"
  end

  def install
    (buildpath/"gtest").install resource "gtest"
    (buildpath/"gtest/googletest").cd do
      system "cmake", "."
      system "make"
    end
    ENV["CXXFLAGS"] = "-I../gtest/googletest/include"

    # Don't build in debug mode. See:
    # https://github.com/Homebrew/homebrew/issues/9279
    # https://github.com/protocolbuffers/protobuf/blob/5c24564811c08772d090305be36fae82d8f12bbe/configure.ac#L61
    ENV.prepend "CXXFLAGS", "-DNDEBUG"
    ENV.cxx11

    system "./autogen.sh"
    system "./configure", "--disable-debug", "--disable-dependency-tracking",
                          "--prefix=#{prefix}", "--with-zlib"
    system "make"
    system "make", "install"

    # Install editor support and examples
    doc.install "editors", "examples"

    ENV.append_to_cflags "-I#{include}"
    ENV.append_to_cflags "-L#{lib}"

    resource("six").stage do
      system "python3", *Language::Python.setup_install_args(libexec)
    end
    chdir "python" do
      system "python3", *Language::Python.setup_install_args(libexec),
                        "--cpp_implementation"
    end

    version = Language::Python.major_minor_version "python3"
    site_packages = "lib/python#{version}/site-packages"
    pth_contents = "import site; site.addsitedir('#{libexec/site_packages}')\n"
    (prefix/site_packages/"homebrew-protobuf.pth").write pth_contents
  end

  test do
    testdata = <<~EOS
      syntax = "proto3";
      package test;
      message TestCase {
        string name = 4;
      }
      message Test {
        repeated TestCase case = 1;
      }
    EOS
    (testpath/"test.proto").write testdata
    system bin/"protoc", "test.proto", "--cpp_out=."
  end
end